Work holder for lathes



April 3, 1945. cw N c 2,372,787

WORK HOLDER FOR LATHES Filed Sept. 29, 1943 '2 Sheets-Sheet l Inventor IZbZes'Zaw Z2220222k0- April3, 1945. c K I 2,372,787

WORK HbLDER FOR LATHES Filed Sept. 29, 1943 2 Sheets-Sheet 2 Inventorzaz azawzzzwazizw Patented Apr. 3, 1945 UNITED STATES PATENT OFFICE WORKHOLDER FOR LATHES Boleslaw Licwinko, Conshohocken, Pa.

Application September 29, 1943, Serial No. 504,318

1 Claim.

My invention relates to improvements in work holders for use moreparticularly, but not necessarily, in lathes when working on steeldisks. The principal object of my invention is to provide simplyconstructed, inexpensive means for mounting said disks on the head stockof a lathe and demounting the same without stopping the lathe, so thatthe cutting of such disks is materially expedited.

Other and subordinate objects are also comprehended by my invention, allof which, together with the precise nature of my improvements, will bereadily understood when the succeeding description and claim are readwith reference to the drawings accompanying and forming part of thisspecification.

In said drawings:

Figure l is a view partly in side elevation and partly in longitudinalsection of my improved work holder, in its preferred embodiment,applied.

Figure 2 is a perspective view of the mandrel and parts carried thereby.

Figure 3 is a view in end elevation of the same, and

Figure 4 is a view in perspective of the jig.

Referring to the drawings by numerals, according to my invention, a workholder is provided having the form of a mandrel l equipped at one end,preferably integrally therewith, with a circular concentric head 2formed of a flat radial web 3 provided with an annular right angled edgeflange 4. The flange 4 provides a hand grip, as will presently moreclearly appear. Adjacent the opposite end thereof, the mandrel I isprovided with a flat faced, circular collar 6 and a terminal section 9of the mandrel is externally" threaded from the collar 6. The web 3 hasa conical, axial seat l therein. A tubular jig ll, internally threaded,as at 12, is provided, in which the terminal section 9 is designed to beturned.

In the use of the described parts, the jig l l is clamped in the chuckl3 of the usual head stock M of a lathe, the bed of which is representedat IS. The section 9 of the mandrel I is steel disk H to be cut. Theoperator grasping the head 2, by the flange 4, then guides the section 9into the rotating jig H holding said head against rotation so that underrotation of the 4 chuck i3 and jig II, the section 9 is fed into the jiguntil the disk I! is clamped between said jig and the collar 6. Theusual tail stock I8 is then fed toward the head 2 to enter the center I9of of said tail stock in the seat Ill. When the disk I! has beensufiiciently cut, or otherwise tooled, the tail stock l8 may be backedoff to release the head 2, said head held stationary and the lathereversed to reverse the chuck l4 and jig H, so that under reverserotation of the chuck and jig, the section 9 of the mandrel I will bebacked out of the jig. The disk Il may then be removed from the section9 and another disk substituted.

The foregoing will, it is believed, suffice to impart; a clearunderstanding of my invention without further explanation.

Manifestly, the invention, as described, is susceptible of modificationwithout departing from the inventive concept, and right is hereinreserved to such modifications as fall within the scope of the appendedclaim.

What I claim is:

A work holder for mounting in a chuck and tail stock of a lathe tosupport an axially bored disk comprising a tubular internally threadedmember for mounting in said chuck, a mandrel having a threaded endsection for insertion through the bore of the disk and turning into saidmember, an enlarged head on the other end of said mandrel forming a handgrip and having a conical seat therein in the axis of the mandrel forreceiving the center of the tail stock, and a circumferential collar onsaid mandrel adjacent the threaded end section for clamping against saiddisk under turning of said section into said member.

BOLESLAW LICWINKO.

